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Finding the Fourth Proportional to 215,940.80, 323,911.20 and 189,696.80

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Solution

The fourth proportional to 215,940.80, 323,911.20 and 189,696.80 is: 284,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,940.80 : 323,911.20 = 189,696.80 : x
  2. Step 2: Convert to fraction form
    215,940.80/323,911.20 = 189,696.80/x
  3. Step 3: Cross multiply
    215,940.80x = 323,911.20 × 189,696.80
  4. Step 4: Simplify right side
    215,940.80x = 61,444,918,124.16
  5. Step 5: Solve for x
    x = 61,444,918,124.16/215,940.80
  6. Step 6: Final answer
    x = 284,545.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.